prefer global Quotient_Info lookup to accomodate Quotient_Term, which is not quite localized yet (cf. 9fd6fce8a230);
structure ROOT =
struct
structure Codegen =
struct
fun lookup ((k, v) :: xs) l =
(if ((k : string) = l) then SOME v else lookup xs l)
| lookup [] l = NONE;
end; (*struct Codegen*)
end; (*struct ROOT*)